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发明名称
Rotating device for mechanical signs
摘要
申请公布号
US3006093(A)
申请公布日期
1961.10.31
申请号
US19590796697
申请日期
1959.03.02
申请人
BURK ROBERT L;FRANK HEDGE
发明人
BURK ROBERT L.;HEDGE FRANK
分类号
G09F11/23
主分类号
G09F11/23
代理机构
代理人
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